Heating device



2 Sheets-Sheet l B. F. FULLERTON HEATING DEVICE Filed Aug. 3, 1940 V INVENTOR. Ben amm RFullerton ATTORNEY.

June 26, 1945.

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B. FQFULLERTON I 2,379,348

HEATING DEVICE I I Filed Aug. 3, 1940 2 SheetsSheet 2 2a 1 INVENTOR.

Be mm F3 Fullerton 4.; ATTORNEY.

Patented June 26, 1945 UNITED STATES PATENT OFFICE HEATING DEVICE Benjamin F. Fullerton, Amarillo, Tex. Application August 3, 1940, Serial No. 350,838

2 Claims. (01. 126-118) This invention relates to an improvement in heating devices, and more particularly to the type of heating device known as a floor furnace, inasmuch as it is suspended beneath the floor Izvith a heating opening substantially at the floor evel.

Various types of floor furnaces have been pro-' posed heretofore, but for the part, these have not been altogether satisfactory due to their in-.,.

creating a fire hazard due to the contact of thesurrounding wall of the furnace with the wood construction of the building, provision being made for drawing in the air to be heated around the heating portion of the furnace so as to insulate the latter and to be preheated thereby.

' These objects are accomplished in a preferred embodiment of the invention by the construction of a casing in which a plurality of spaced heating chambers are provided, each of which preferably has corrugated or finned side walls, and which are enclosed by a shell spaced from the surrounding wall of the casing with provision for down fiow of cool air therebetween and for up fiow of hot air within the shell about the heating chambers for heating of the air thereby.

This preferred embodiment of the invention is illustrated in the accompanying drawings in which:

Fig. l is a vertical sectional view through the floor furnace in place, showing the heating chambers in side elevation;

Fig. 2 is a top plan view thereof with a portion of the grill broken away and a part in section;-

Fig. 3 is a vertical sectional view through the heating chambers;

Fig. 4 is a cross sectional view therethrough on the line 4--4' of Fig. 3;

Fig. 5 is a similar view on the line 5-5 of Fig. 3;

Fig. 6 is a detail top plan view of an edge of a heating chamber showing the formation of the corrugations; and

Fig. 7 is a detail horizontal section througha corrugated side on the line 1-1 of Fig. 3.

Referring to Fig. 1 of the drawings, this floor furnace is shown as suspended from, the floor I of a building, within an opening 2 therein, preferably of a size and shape substantially corresponding with the furnace. Normally this opening is covered by a removable grill or perfo rated plate'3 through which air and heat waves may pass.- I

The furnace is constructed of a casing 4 shown as of rectangular shape with vertical side walls, the upper ends'of which are provided with outturned flanges 5 seated upon the floor l about the opening .Zfor suspending the furnace from the floor. The 'casing .4 is substantially closed at its lower endby a bottom 6.

A main heating chamber 1 is seated upon the bottom 6 about an opening 8 therein, and has a downwardly extending sleeve 9 projecting into said opening. Thesleeve '9 is also secured to the bottom 6 of the casing by, angle bars H! which are riveted, bolted, welded, or otherwise secured thereto.

The heating chamber 1 is elongatedvertically, anda secondary heating chamber ll extends parallel therewith and spaced therefrom, as shown in Figs. 1 and 3. The heating chambers 'l and H are connectedtogether adjacent their upper ends by a short flue or passageway l2, and have their lower ends held in spaced relation by a brace I3. A flue l4 extends laterally from the lower end portion of the secondary heating chamber ll through a side wall of the casing 4, the opening therearound being sealed by a thimble IS.

The heating chambers l and II have plane smooth sides facing each other to facilitate welding of the flue connection I? therebetween, and thelower portion I6 of the heating chamber H is also smooth for a like purpose, but the other sides of the heating chambers are provided with corrugations designated H, which are formed integrally in the side walls thereof. As shown in Fig. 6, the upper end of each corrugation ll has triangular projections l8 which are turned inward and welded together along a, line l9 to close the top of each corrugation. The top of the chamber 1 is closed by a cover plate 20, while the top of the chamber II is similarly closed by a cover plate 2|, the edges of which are welded preferably to the inner edges of the inturned projections I8, as shown in Fig. 6, whereby a minimum of welding will be necessary while yet securely fastening the parts together in a unitary rigid structure. The bottom of the chamber I is open, as described above, while the bottom of the chamber l I is closed by the section l6, as shown in Figs. 3 and 5.

The secondary chamber II is provided with a vertical flue 22 which extends therethrough for directing air through the chamber out of contact with the products of combustion passing therethrough but to be heated thereby.

Supporting brackets 23 are secured to sides of the heating chamber I, and extend outwardly therefrom, supporting a lower edge of a surrounding shell 24, that is spaced inwardly from the side walls of the casing 4 and which is also spaced outwardly from the heating chambers 1 and I I the opposite side of the shell 24 being seated upon and supported by the flue pipe I4. The shell 24 has an inner wall plate 25 spaced therefrom for insulation to confine the major portion ofthe heat within the shell. The shell has its upper portions braced by brackets 26 which extend outwardly from the heating chambers l and II and engage the corners of the shell to hold it in place. As shown in Fig. 1, the shell 24 has its lower edge spaced from the bottom 8 of the casing, and is also spaced from the surrounding sides thereof forming a downward passageway therebetween that is adapted to receive cold air through the outer portion of the grill 3, as indiv cated by the arrows, which cold air is directed downwardly through the surrounding passageway 21, beneath the lower edge of the shell and into the space surrounding the heating chambers 1 and II, to be heated thereby and directed upwardly into the central portion of the grill 3. The corrugations I! provide side fins on the heating chambers, having greatly increased area of radiation, thereby increasing the efliciency of the unit, providing better heating of the air during its passage about the heating chambers.

Although any suitable or desired type of heating means may be provided, I have shown and. preferably use a gas burner, designated 28, which is located within the sleeve 9 and is suspended by a cradle 28 therefrom. The burner 28 is provided with the usual control valve 30 having an adjusting rod 3| extending upwardly through the casing 4 to a point adjacent the grill 3 for ready access therethrough when adjustment is desired. The fuel is supplied to the burner 20 through a pipe 32 having a gas manifold 33 connected therewith. An inspection window 34 is provided in a cap 35 in the upper end of the heating chamber 1, through which the burner 28 may be inspected for adjustment or otherwise, when desired, without opening the heating chamber.

It will be evident that when the burner 28 is actuated, the products of combustion and heated air will ass upwardly through the heating chamber 1 and the flue connection l2, thence downwardly through the heating chamber II for discharge through the flue pipe 14. The heat will be radiated therefrom by the heating chambers and particularly the corrugated walls thereof to heat the air currents that have been directed downwardly around the shell 24 and upwardly therethrough so as to supply heated air to the mid portion of the grill 3. By circulating the cold air downward around the shell 24, the casing 4 is maintained relatively cold, creating no flre hazard where it comes in contact with surrounding wood construction of the building.

I claim:

1. In a heating device, a heating chamber having an upwardly extending side wall provided with a. plurality of upwardly extending corruga- -tions therein for directing heated air vertically of said wall, each of said corrugations having a pair of inturned triangular flanges with the inner edges thereof secured directly together and extending over the open end of said corrugation throughout the depth thereof, and a cover for said heating chamber having the outer edge thereof secured directly to the inner edges of said flanges.

2. In a heating device, a heating chamber having a top cover and an upwardly extending side wall provided with a plurality of upwardly extending corrugations therein, each of said corrugations having a pair of walls arranged at an angle to each other, said top cover having the periphery thereof inwardly of the corrugations, and flanges attached to the upper ends of the corrugation walls and extending inwardly therefrom to the peripheral edge of the cover at an obtuse angle to said cover.

BENJAMIN F. FULLERTON. 

